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Recent content by fvincent

  1. fvincent

    Klaraid IC1176L

    ashtree, calcium sulfate in solution due to the solubility of such salt (> 2000 ppm) Regards fabio vincent www.figener.com.br
  2. fvincent

    Klaraid IC1176L

    Dear friends, A company I have been working for is testing in the second stage of its wastewater treatment plant the use of Klaraid IC1176L (based on polyaluminium chloride) to obtain sulfate removal. The sulfate content of the influent is around 1200 ppm (mainly as calcium sulfate). Tests...
  3. fvincent

    large motor plus LCI for cracker compressors

    Thanks, zdas04, The project I refer to is a new cracker within a petrochemical complex. The proposed design is to drive the main compressors with condensing steam turbines. However in the entire complex there are other companies that require process steam and so additional boilers other than...
  4. fvincent

    large motor plus LCI for cracker compressors

    Thanks, zdas04, The project I refer to is a new cracker. The proposed design is to drive the main compressors with condensing steam turbines. However in the entire complex there companies that require process steam and so additional boilers beyond the furnaces steam generators are required...
  5. fvincent

    large motor plus LCI for cracker compressors

    Dear colleagues, Some crackers in France employ electric driven compressors for charge gas, C3R. TOTAL plant in Gonfreville has a 35MW electric driven CGC. Why such practice is not so widespread (except in new LNG plants and compression stations))? CAPEX only? Reliability? It seems a very...
  6. fvincent

    A 335 P23 vs P91 at 567oC

    stanweld, thanks for your reply. P23 was anyway a better choice than P91 or P92? Can you tell me why? regards fabio vincent www.figener.com.br
  7. fvincent

    A 335 P23 vs P91 at 567oC

    A 213 T23 has been used in HRSG boilers, but I have no notice of A335 P23 being used for long pipes (except pipings between superheaters). Any idea why? fabio vincent www.figener.com.br
  8. fvincent

    pressure drop in seawater lines HDPE

    thanks for the answers, BigInch and zdas04 zdas04, do you think a 2 inch accumulation is a reasonable value to consider for such pipe (diameter is 600 mm) or that value is only a "might be"? Have you ever experienced such accumulation in HDPE piping operating with seawater? Can you give me any...
  9. fvincent

    pressure drop in seawater lines HDPE

    HDPE pipe manufacturers sustain that HDPE pipes maintain a very low rugosity even for seawater intakes and pipings (< 0.015 mm) That sounds non-realistic to me. I was wondering if you have a better figure of the effective rugosity of HDPE pipes after some months/years of use. The case I am...
  10. fvincent

    A 335 P23 vs P91 at 567oC

    Do you have any experience with comparing P23 and P91 for steam lines connecting boiler to turbine (400 t/h, 130 bar abs at 567oC)? Is P23 already used in certain extent? Any idea of their costs in USA or Europe or Japan($/kg)? Thanks a lot fabio vincent www.figener.com.br
  11. fvincent

    A335 for superheater coils

    thanks, davefitz fabio vincent www.figener.com.br
  12. fvincent

    A335 for superheater coils

    thanks a lot, metengr fabio vincent www.figener.com.br
  13. fvincent

    A335 for superheater coils

    Is it permitted to construct the superheater coils with SA-335 P22 instead of SA-213 T22, according to ASME Section 1? The reason for that is only availability. Thanks a lot regards fabio vincent www.figener.com.br
  14. fvincent

    choking flow in micromotion flow element

    Have you ever used the online software of micromotion (emerson) and detected that compressible flow is not taken into account? Or am I wrong? For a general gas there is no field for cp/cv and depending upon the mass flowrate given certain pressure, density and temperature , velocity higher than...
  15. fvincent

    Specific work (We)

    kJ refers to the scalar work (and so energy), that is, the scalar product of two vectors: force times displacement in the same orientation or |F|.|d|.cos(teta) where teta is the angle between the two vectors. Although J is the product of N.m, it is completely different from m.N which refers to...
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